First, what effect does age at the time of focal brain injury have on attentional systems? The long-term effect of perinatal injury and injury in early or late childhood is likely to be different, but the precise nature of those differences remains to be worked out. While the effects of perinatal injury on visuospatial attention have been investigated, the effects of injury acquired in later childhood have not received similar scrutiny. Second, what aspects of visuospatial attention, if any, are affected in children with diffuse disease such as genetic or metabolic developmental disorders? Studies of children with 22q11.2 deletion and Williams syndrome demonstrate that genetic conditions can be associated with focal neurologic dysfunction. A better understanding of the abnormalities of attentional systems in these children, even if not their primary deficit, would contribute considerably to an appreciation of their functional disabilities. Third, do primary attentional deficits have an effect on the development of other cognitive systems? The orderly developmental sequence of visuospatial attention presumably has adaptive advantages. Attention plays a critical role in the development of sensory-motor integration and is likely to provide important scaffolding on which other cognitive abilities like praxis and even language are constructed. The effect of deficits in specific components of spatial attention on other cognitive domains remains unexplored. Such studies promise to offer critical insight into neural plasticity and the interfaces between cognitive domains in the developing brain.